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International Journal of Antennas and Propagation
Volume 2014, Article ID 368090, 12 pages
http://dx.doi.org/10.1155/2014/368090
Research Article

A New Approach and Analysis of Modeling the Human Body in RFID-Enabled Body-Centric Wireless Systems

1Wireless Identification and Sensing Systems Research Group, Department of Electronics and Communications Engineering, Tampere University of Technology, 33720 Tampere, Finland
2Department of Electrical Engineering, University of California, Los Angeles, CA 90095, USA

Received 2 October 2013; Revised 10 March 2014; Accepted 12 March 2014; Published 24 April 2014

Academic Editor: Young Joong Yoon

Copyright © 2014 Karoliina Koski et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Body-centric wireless systems demand wearable sensor and tag antennas that have robust impedance matching and provide enough gain for a reliable wireless communication link. In this paper, we discuss a novel and practical technique for the modeling of the human body in UHF RFID body-centric wireless systems. What makes this technique different is that we base the human model on measured far-field response from a reference tag attached to the human body. Hereby, the human body model accounts for the encountered human body effects on the tag performance. The on-body measurements are fast, which allows establishing a catalog of human body models for different tag locations and human subjects. Such catalog would provide a ready simulation model for a wide range of wireless body-centric applications in order to initiate a functional design. Our results demonstrate that the suggested modeling technique can be used in the design and optimization of wearable antennas for different real-case body-centric scenarios.